Static solvent contact angle measurements, surface free energy and wettability determination of various self-assembled monolayers on silicon dioxide
Static solvent contact angle measurements, surface free energy and wettability determination of various self-assembled monolayers on silicon dioxide
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DOI：
10.1016/j.tsf.2006.04.006
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发表时间：
2006-12-05
期刊：
影响因子：
2.1
通讯作者：
Dehaen, Wim
中科院分区：
文献类型：
--
作者：
Janssen, Dimitri;De Palma, Randy;Dehaen, Wim
在许多领域和应用中，对溶剂在表面上的润湿行为的良好了解至关重要。自组装单分子膜（SAM）已经能够改善对表面性质的控制，而最近的领域，如有机电子学，引起了新的应用和要求，关于溶剂-基板相互作用。然而，大多数报道的润湿性研究仅限于实际上不太相关的溶剂，如水，二碘甲烷或十六烷。在这里，我们报告静态接触角测量的各种，典型的SAM改性表面，表征这些表面的润湿性在广泛的实际相关的溶剂。表面能，极性和分散的组件，这些SAM改性的表面提取与各种方法从接触角数据。可靠的表面能提取方法，如Owens-Wendt-Rabel-Kaelble方法和Wu之后的方法，产生的值可以从自组装分子的化学结构和性质中预期，并且与少数文献报道的值很好地对应。我们还确定了各种表面的润湿包络线，这使得可以容易地预测表面对某种溶剂的润湿性，并确保与当前和未来溶剂的相关性。(c)2006 Elsevier B. V.保留所有权利。
In many fields and applications, a good knowledge of the wetting behaviour of solvents on a surface is crucial. Self-assembled monolayers (SAMs) have enabled improved control over surface properties, while more recent fields such as organic electronics gave rise to new applications and requirements regarding solvent-substrate interactions. However, most reported wettability studies are limited to practically less relevant solvents such as water, diiodomethane or hexadecane. Herein we report static contact angle measurements of various, typical SAM-modified surfaces, characterizing these surfaces' wettabilities over a wide range of practically relevant solvents. Surface energies, both the polar and the disperse component, of these SAM-modified surfaces are extracted with various methods from the contact angle data. Reliable methods for surface energy extraction, such as the Owens-Wendt-Rabel-Kaelble method and the method after Wu, yield values which could be expected from the chemical structure and nature of the self-assembled molecules and which correspond well to the few reported literature values. We also determined wetting envelopes for the various surfaces which allow easy prediction of the surfaces' wettability for a certain solvent and which ensure relevance for current and future solvents. (c) 2006 Elsevier B.V. All rights reserved.